EM Test esd NX30
Instruction Manual V 1.00.7 26 / 33
7 TEST PROCEDURES
Test standards, such as IEC / EN 61000-4-2, give detailed information about the assembly of the test rig, the associated
organization, the EUT itself and the documentation.
7.1 Standard-compliant procedures
The ESD simulator system type esd NX30 is constructed in accordance with the requirements called for in the standard and is
calibrated in a standard-conform manner.
The test engineer is duty-bound to study the relevant test requirements and adapt the facilities to suit the EUT in question.
The necessary documents can be obtained directly from the offices of CENELEC (www.cenelec.org), the IEC (www.iec.ch), the
ANSI (www.ansi.org), the IEEE (www.ieee.org) etc., or they are available from national standards bureau.
7.2 Other situations
It is not always possible to arrange a test rig in exact conformity with the relevant standards. However, by abiding by some
basic rules, it is still possible to obtain meaningful assessments of a EUT’s sensitivity to interference and to obtain valuable
pointers to improving its immunity.
An electrostatic discharge is always associated with high frequency properties, which extend well above the 1 GHz range.
Screening, earthing and filtering measures must therefore also be effective up into this range of frequencies.
The possible paths the pulse energy might take need to be thought about. It is absolutely essential the pulse return path is
fed back through the generator’s earth cable.
Due to better reproducibility the contact-discharge method is to be preferred over the air-discharge method. The former
must, however, be arranged so that true metal-to-metal contact with the EUT is achieved.
Fast repetitive discharges are only of real use to quickly localize weak spots in construction or to pin-point critical situations
in program routines. Single pulses are then to be used for detailed investigations and to assess the sensitivity to interfer-
ence.
An exact record is to be kept describing the test conditions complete with photos of the test rig, details of the type and quan-
tity of discharges, notes about the ambient climatic conditions, remarks concerning the effects observed etc.
Example of test set-up for automotive EUTs including harnesses and,
Example of test set-up for floor-standing equipment - laboratory tests and,
To Next Page
Loading...
Need help?
General
